day of service to honor dr. martin luther king jr. president barack obama stained a bookcase at an elementary school. >> everybody here, adults to children, understands the importance of giving back. >> reporter: last night, katy perry, usher and others performed at a kids inaugural ball honoring military families and their children. the first lady and her daughters were there as they kicked off three days of parties and balls to celebrate her husband's election. in about 40 minutes, president barack obama will receive the official swearing in from chief justice john roberts. he will be at the white house in the blue room. the president's family will be there with some members of the staff. it will be televised and. tomorrow, the ceremonial swearing in where thousands will be watching it on the washington mall. reporting live, randall pinkston, back to you. >> yeah, expecting thousands to be here. how difficult it is for the ordinary citizen to get a good spot to watch the ceremony? >> reporter: well, probably impossible now. here's why.